Marktest is leading in Top 10K Sites and Top 100K Sites.
WebProspector has better usage coverage in more websites categories. Including Business & Industry, Marketing & Advertising, Internet & Telecom, Computer & Electronics and 19 other categories.
Marktest is leading in Music & Audio and Newspapers.
WebProspector is leading in most countries, including Germany, Austria, United States, France and 10 other countries.
Marktest is leading in Portugal, Brazil and Malaysia.